Both are true. Mobile-first, Coda is not. @Frank_Strack should chime in.
I tend to avoid any use of Coda Mobile; it’s simply not keeping up with my use cases. I’ve had pretty success with Coda + Safari, and I use it with GrammarlyGO a lot.
To simplify using Coda (Safari) as a note-taking app, I capture all notes into a single document and then use a way too elaborate method using packs and webhooks to classify (using Coda AI) and forward notes to key documents. I take these automation ideas to an irrational extreme to learn, mostly.